why 3^3^3 is not 3^27?

$${{\left({{\mathtt{3}}}^{{\mathtt{3}}}\right)}}^{{\mathtt{3}}} = {\mathtt{19\,683}}$$

$${{\mathtt{3}}}^{{\mathtt{27}}} = {\mathtt{7\,625\,597\,484\,987}}$$

Because in 3^3^3,  you multiply 3*3*3=27

Then you multiply 27*27*27=19 683

3^27 is 3 times itself 27 times with no break

Great answer Happy :)